8cdfa4f6bf
exploit a defect in EDNS option processing can cause named to terminate with an assertion failure. This fixes a missing isc_buffer_availablelength check when printing out a packet." (This doesn't affect 9.9.x in 5.5-stable). A few other fixes most of which don't affect us (one notable one is a fix for GCC 4.9.0 optimizing away a null pointer check, more info on this at https://kb.isc.org/article/AA-01167/)